WO2024041548A1

WO2024041548A1 - Table board assembly structure, and table board processing and jointing process

Info

Publication number: WO2024041548A1
Application number: PCT/CN2023/114332
Authority: WO
Inventors: 俞鹏飞; 王肖明; 王科亭; 王巍
Original assignee: 永艺家具股份有限公司
Priority date: 2022-08-22
Filing date: 2023-08-22
Publication date: 2024-02-29

Abstract

A table board assembly structure, and a table board processing and jointing process. The process comprises: first prefabricating two table board units (a); then drilling holes in a jointed side wall (a1) of a single table board unit (a) in sequence by using a hole arrangement device (B); placing and positioning the table board units (a) on a bearing station of the hole arrangement device (B); pressing down a positioning pressing beam (8) located above the rear of the table board units (a), so as to tightly press the table board units (a); synchronously feeding drill bits (11) arranged in a horizontal direction, so as to process the jointed side walls (a1) to form a row of positioning holes (34); pre-inserting and fastening a connecting rod (35) of a three-in-one connecting member in one of the table board units (a); pre-burying hard annular sleeves (38) in the table board units (a), and arranging eccentric wheel fasteners (36) of eccentric wheel structures in the annular sleeves (38); then sequentially arranging positioning pins (41) in the positioning holes (34) in a penetrating manner; subsequently jointing the two table board units (a) together, respectively inserting two ends of the positioning pins (41) into the two table board units (a), and respectively inserting two ends of the connecting rod (35) into the two table board units (a); and finally screwing and acting on the eccentric wheel fasteners (36), so that the eccentric wheel fasteners (36) tighten and act on the connecting rod (35) so as to lock the two table board units (a).

Description

Table assembly structure and table processing and splicing technology

Technical field

The invention relates to the field of plate processing and connection, and in particular to a table assembly structure and table processing and splicing technology.

Background technique

Tables are one of the indispensable pieces of furniture in current home life. Tables are divided into dining tables, office desks, coffee tables, desks, etc., and the whole structure is fixed. With the current trend of e-commerce, online sales Products need to be shipped to customers by logistics, so for tables that need to be transported over long distances, the table as a whole takes up a lot of transportation space, and the packaging volume is large, making it difficult to place the table during transportation and making transportation very inconvenient; therefore, the transportation cost of the product will be will increase; tables that facilitate packaging and transportation and reduce packaging and transportation costs will bring higher benefits to companies and manufacturers. For a table, the part that takes up the most packaging volume is the table board. A single table board is thick and heavy, making it difficult to package and transport, and it is not conducive to allocating the occupied space during transportation. Therefore, many tables on the market now divide the table board into multiple pieces. Small table boards are spliced together to form a tabletop, thereby solving the above problems; in addition, the splicing structure between the small table boards after dividing the table boards can adopt a variety of methods.

The table splicing structures currently on the market mainly include the following types:

1. Adopting a plug-in structure, one of the two adjacent table boards is provided with a latch or a mortise, and the other of the two table boards is correspondingly provided with a jack or mortise; when the two tables are connected, The boards can be plugged together. This structure has the advantages of easy positioning, quick connection, and the ability to eliminate connection traces after connection. For example, patent number CN201610213091.6 discloses a spliced square table, which includes four spliced table boards. The table boards respectively have two mutually perpendicular outer edges, and two inner edges that are in consistent contact with the other two table boards. The inner edges are provided with slots or tongues, and the bottom surfaces of the table boards are respectively provided with table legs. The invention has a simple structure and is easy to assemble. When in use, the table boards are spliced together through tongues and slots. After use, the table boards are disassembled and the table legs are folded, occupying less storage space. This allows the room to be fully utilized. However, this type of structure also has an obvious shortcoming: the connection strength is not enough. The two boards are only supported by the plug-in part. If one of the boards is pressed hard, the board will sink relative to the other board due to the force. There is a height difference between the other boards, which means that uniform force cannot be ensured and connection stability cannot be guaranteed; and the two table boards cannot be locked.

And if pin connection is used, rows of holes need to be processed on the spliced side walls of each table board; the existing conventional method is to use an ordinary drill machine to process individual holes on the table board in sequence, so that these holes form rows of holes; This undoubtedly has low processing efficiency, and it is difficult to ensure that the hole positions of these holes are at the same level. For table boards used for splicing, if the holes used to connect the pins are not on the same horizontal line, it will cause unevenness between the two table boards after splicing, and the stress will easily be concentrated on a few pins, resulting in stress Not dispersed and structurally unstable. Therefore, due to the requirements on the number and location of holes, it is very troublesome to perform manual processing operations and ordinary drilling machines, and the efficiency is not high. The shape and position tolerance of the holes is not easy to control, and it is easy to waste materials.

2. Use common three-in-one connectors to assemble the two table boards. For example, the patent number CN202021818402. In another wooden board, the nut is provided with a through slot that matches the annular sleeve of the connecting rod, and a threaded hole set vertically with the through slot; the locking nut is threadedly matched with the threaded hole and with the lock. The tight groove fits against the snap fit. The utility model provides a three-in-one connector, which uses an annular sleeve fit between the connecting rod and the nut, a thread fit between the locking nut and the nut, and abutment between the locking nut and the connecting rod. The snap connection improves the anti-loosening effect between the three, reduces the joint distance between two adjacent wooden boards, and thereby improves the firmness and load-bearing capacity of the connection between the two adjacent wooden boards. The method of splicing two wooden boards together using a three-in-one connector is a relatively common application structure in the current prior art. However, the three-in-one connector is mainly used for connecting two mutually perpendicular plates and is used in cabinets and other furniture structures; because the extrusion direction of the force between the two mutually perpendicular plates is different from the three-in-one connector. The connecting rods have the same length direction, thus ensuring structural stability. And if it is used for two horizontal spliced table boards, if the three-in-one connector is used to bear the force alone; if one of the boards is pressed hard, the board will sink relative to the other board; thus the connecting rod will be moved vertically. ; If used for a long time, the threaded end of the connecting rod will easily loosen, causing the connecting rod to detach; there is a hidden danger of unstable connection.

In view of the above problems, there is an urgent need to design a processing and splicing process for table boards that makes it easy to process the hole positions of the table boards and has high hole position accuracy; and can ensure the structural strength and flatness of the two table boards after they are joined together.

Technical solutions

The present invention overcomes the deficiencies in the prior art and provides a table processing and splicing process. The invention uses a hole arrangement device to process positioning holes for the table unit, and then uses positioning pins and three-in-one connections to perform positioning on the table. Splicing makes drilling easy, and after splicing, the structure between the two table units is stable and the flatness is high.

Furthermore, the present invention provides a table assembly structure. By installing an annular sleeve in the slot of the table unit, the eccentric fastener is in contact with the annular sleeve; and then the eccentric fastener is rotated. When tightening, it will not come into contact with the inner core of the table unit; thus the force will be even, the eccentric fastener will not be skewed, and the appearance will be smooth and beautiful.

The technical solution of the present invention is implemented as follows:

A table board processing and splicing process includes the following steps:

Step 1: Prefabricate at least two table units for splicing, and the table units can be spliced to form an overall horizontal desktop;

Step 2: Use the hole arrangement device to drill holes in the spliced side walls of a single table unit in sequence; place and position the table unit on the supporting station of the hole arrangement device; position the positioning pressure plate directly above the table unit And the positioning pressure beam located at the rear and upper part of the table unit is pressed down respectively to compress the table unit; multiple drill bits located at the rear end of the table unit and arranged in the horizontal direction feed simultaneously to splice the side walls of the table unit A row of positioning holes are formed through one-time processing, and the centers of the positioning holes are on the same straight line;

Step 3: Pre-embed a hard annular casing in the table unit, and set a three-in-one connector between the two table units; the connecting rod of the three-in-one connector is pre-inserted into one of the table units. inside; set the fasteners of the eccentric structure of the three-in-one connector inside the annular casing;

Step 4: Insert the positioning pins into the positioning holes of one of the table units in order, and the positioning pins are plugged into the positioning holes;

Step 5: Splice the two table units together so that both ends of the positioning pins are inserted into the two table units; at the same time, the two ends of the connecting rod are inserted into the two table units;

Step 6: Tighten the fastener, and the fastener will tighten the connecting rod to lock the two table units.

Preferably, in step three, an internal hexagonal groove is formed on the upper end surface of the fastener. Traditional fasteners use cross sink grooves, but because the present invention adds an annular sleeve, the structural strength of the connection is increased; the fasteners can withstand greater twisting force, so internal hexagonal sink grooves are provided on the fasteners. , the L-shaped hexagonal wrench can be used to tighten the fasteners, making the operation more labor-saving and easier.

Preferably, in step two, a plurality of through holes for passing connecting rods are formed on the spliced side walls of the table unit; the through holes are processed simultaneously by the drill when processing the positioning holes, and the through holes are The centers of the positioning holes are also on the same straight line; the end surface of the table unit is provided with a slot for accommodating the fastener at the position corresponding to the through hole, and the via hole and the slot are connected; in step three, the The annular casing is embedded and installed in the embedding groove, and the height of the annular casing is equal to the longitudinal depth of the embedding groove. Through holes and embedded grooves are provided to facilitate the connection of the three-in-one connector; and after the annular sleeve is embedded in the embedded groove, the upper end surface of the annular sleeve is flush with the upper end surface of the table unit, and the structure is beautiful.

Preferably, the via holes and positioning holes are staggered. This makes the table plate evenly bear force and make the splicing more stable.

Preferably, the annular sleeve is clamped in the embedding groove, and the annular sleeve and the embedding groove are interference fit. After the annular sleeve is embedded in the embedding groove, the annular sleeve is tightly connected in the embedding groove and will not break away from the embedding groove.

Preferably, the annular casing is provided with a notch for the connecting rod to pass through; and the outer wall of the annular casing is evenly provided with wavy-shaped convex teeth, and the inner wall of the annular casing is evenly provided with Inward convex teeth arranged in a wavy shape. The external convex teeth can increase the friction between the annular casing and the embedded groove, so that the two are closely connected, and the annular collar will not deflect in the embedded groove; and the contact area between the annular casing and the embedded groove is reduced, so that The annular sleeve is easier to fit into the groove. The inner convex teeth can increase the friction between the annular casing and the fastener, so that the fastener will not retreat after being screwed in the annular casing.

Preferably, in step two, there is a supporting platform for carrying the table unit at the supporting station; side positioning assemblies located on both sides of the supporting platform and front and rear positioning mechanisms located at the front and rear ends of the supporting platform position the table unit Position horizontally on the support platform. The table unit is relatively fixed to the supporting platform in the front-to-back direction and the left-to-right direction.

Preferably, the front and rear positioning mechanism includes a limiting horizontal plate disposed at the rear end of the workbench and a front positioning assembly disposed at the front end of the workbench; the front positioning assembly includes a front positioning push plate that can move forward and backward; the front positioning push plate moves the table Push the unit backward until it butts against the limiting horizontal plate.

Preferably, the hole arrangement device includes a drilling mechanism arranged behind the limiting horizontal plate. The drilling mechanism includes an adjustment support that can be moved forward and backward and up and down. The drill bits are arranged side by side on the adjustment support in the left and right directions; The limit horizontal plate is provided with escape slots arranged at intervals on the left and right for avoiding the movement of the drill bit, and the avoidance slots penetrate the limit horizontal plate front and rear. After the rear end of the table unit is in contact with the limit horizontal plate, the drill bit can be controlled to pass forward through the limit horizontal plate to drill the table unit; and the drilling operation can be completed in one feed.

Preferably, the lower part of the front end of the limiting horizontal plate is provided with a number of support bumps extending forward and arranged at intervals left and right. The support bumps are configured to support the table unit; any one of the avoidance slots is located between two between the support bumps; and the upper end surface of the support bumps is flush with the upper end surface of the supporting platform. When the rear end of the table unit is against the limit horizontal plate, the bottom of the table unit will be in contact with the support bump. At this time, the support bump and the support platform jointly support the table unit; and the two adjacent The support bumps are spaced apart; when drilling the table unit, the wood chips of the table unit will fall from the gap between the two support bumps; otherwise, it is easy to accumulate under the table unit. Dust will cause the table unit to be raised; or it will affect the work of the machine.

Preferably, the positioning pressure beam is disposed above the intersection position between the support bump and the supporting platform. Since when drilling, the rear end of the table unit is punched; only the positioning pressure plate is used to press the table unit, and the rear end of the table unit still shakes when drilling; therefore, a positioning pressure beam is provided to further press the unit. Position the table unit at the back so that the table unit remains stable during the drilling process, improving the accuracy of the final hole punching.

Preferably, along the front-to-back direction, the distance between the rear end of the positioning pressure beam and the limiting horizontal plate is between 0.5-5cm. When drilling, the rear end of the plate is against the limiting horizontal plate, so that the positioning pressure beam can stably press the rear drilling area of the plate to ensure the stability of drilling.

Preferably, the drilling mechanism also includes a rear drive mechanism for driving the adjustment support. The rear drive mechanism includes a base plate and two guide posts spaced left and right on the base plate; there are two guide posts on the two guide posts. The lifting console can move up and down along the guide pillars; a rear lifting assembly for controlling the lifting of the lifting console is provided at the upper ends of the two guide posts; and a rear push-pull electric motor is also provided on the lifting console. cylinder; the telescopic main rod on the rear push-pull electric cylinder passes forward through the lifting console and is connected to the rear end of the adjusting support. Then, the rear lifting assembly can drive the lifting console and drive the rear push-pull electric cylinder to move up and down, thereby controlling the adjustment support to move up and down; and the rear push-pull electric cylinder can drive the adjustment support to move forward and backward; it can stably control a row of drill bits synchronously. Feed motion.

Preferably, the rear lifting component is a screw nut structure, and one end of the screw is connected with a handwheel that controls the rotation of the screw. The screw nut has high control accuracy and stable adjustment.

Preferably, the supporting platform includes two supporting horizontal plates spaced front and back and extending along the left and right directions, the supporting horizontal plates are configured to support the table unit; and the upper end surface of each supporting horizontal plate is provided with The grooves are arranged in a wavy shape, and the grooves are arranged on the supporting horizontal plate along the front and rear direction. If the upper end surface of the support horizontal plate is completely horizontal, the contact area between the table unit and the support horizontal plate is large, and it is difficult to ensure that the table unit is completely squeezed and fitted on the upper end of the support horizontal plate, and there will inevitably be a gap; while in the support A groove is provided on the upper surface of the horizontal plate, which can reduce the contact area between the supporting horizontal plate and the table unit, so that the up and down pressing pressure at the contact point between the two is greater, thereby making the pressing and positioning effect better.

Preferably, the positioning pin is made of metal steel pipe. Ensure structural strength.

Preferably, the connecting rod includes a rod body and rod heads located at both ends of the rod body for connection; the length of the positioning pin and the length of the rod body tend to be equal. After the two table units are spliced, when one of the table units is subjected to an extrusion force, the pressure points at both ends of the rod body and the positioning pin are on the same axis, making the structural stress more evenly distributed.

Preferably, the diameter of the positioning pin is larger than the diameter of the connecting rod. The positioning pin is made thicker than the connecting rod, and then the positioning pin mainly plays the role of bearing force after connection, while the connecting rod mainly plays the role of tightening the two table units; both perform their own duties and avoid connecting .

A table assembly structure includes two table units spliced together; the two table units are connected by a three-in-one connector, and the three-in-one connector includes connections that are inserted into the two table units at the same time. rod and an eccentric fastener provided on at least one of the table units. The eccentric fastener is configured to fit tightly with the connecting rod; an eccentric fastener is provided on the end surface of the table unit. The embedding groove; the cross section of the eccentric fastener is circular, the embedding groove is correspondingly set as a circular groove, and the diameter of the embedding groove is larger than the diameter of the eccentric fastener; there is a hard material embedded in the embedding groove. An annular sleeve, the eccentric fastener is embedded in the annular sleeve and can rotate circumferentially in the sleeve.

Preferably, a connection hole for passing a connecting rod is provided on the side of the table unit, and the connecting hole extends until it penetrates the recessed groove; the annular sleeve is provided with a corresponding connecting hole for the connecting rod to pass through. via hole; the annular sleeve and the embedded groove are interference fit.

Preferably, the outer wall of the annular casing is evenly provided with wavy-shaped outer convex teeth, and the inner wall of the annular casing is evenly provided with wavy-like inner convex teeth; The outer wall of the firmware is provided with knurled patterns. This increases the friction between the annular casing and the embedding groove, so that the two are tightly connected, and the annular sleeve will not deflect in the embedding groove; and the contact area between the annular casing and the embedding groove is reduced, so that the annular casing Easier to fit into the slot. Increase the friction between the annular casing and the eccentric fastener so that the eccentric fastener will not retreat after being screwed in the annular casing.

beneficial effects

First of all, in the table processing and splicing process of the present invention, in order to ensure that the two table units are spliced smoothly, the processing requirements for the positioning holes on the table units are high; a hole row device is used to drill the table units, so that during operation , the user only needs to place the table unit on the supporting station; then under the action of the side positioning component, the front positioning component, the positioning pressure plate and the positioning pressure beam, the plate can be stably positioned on the supporting platform ; The drilling mechanism can drive rows of drill bits to feed simultaneously to drill the table unit; the positioning holes and through holes on the spliced side walls of the table unit can be processed and formed in one operation, and due to the positioning pressure beam It can firmly press the rear end of the table unit, resulting in high drilling accuracy, and ensuring that the center of each positioning hole and via hole is kept on the same horizontal line; making the positioning between the two table units better in the subsequent splicing steps. The pin and the connecting rod are at the same height. When plugged together, the two table units can be spliced together smoothly without unevenness at the splicing joint. And the use of a hole arrangement device can realize fully automated drilling of table units and improve production efficiency.

Secondly, by embedding a hard annular sleeve in the slot, the fasteners of the eccentric structure will not come into extrusive contact with the table unit when screwed in the slot, but will directly contact the hard annular sleeve. pipe contact; the purpose of this design is that the common table board structure is roughly composed of: a middle core material and hard plywood on both sides of the core material, and the hard plywood is covered with paper or veneer layer; and for some middle core materials For a softer table top, for example, the core material in the middle is Nanyang Jacaranda, if equipped with a three-in-one connector, if the fastener is in direct contact with the core material in the middle; then when the connecting rod is tightened by twisting, the fastener will The parts will be in extrusion contact with the core material, and because the core material is soft, the fasteners may be embedded in the core material up and down, resulting in poor locking effect and affecting the appearance. By embedding a hard annular casing in the slot, the fasteners are in direct contact with the annular casing, so that the force is evenly distributed, so that the fasteners can maintain positive screwing without deflection; ensuring that the lock Tightening effect and beautifying appearance. Correspondingly, an internal hexagonal sink groove can be formed on the upper end surface of the fastener. Traditional fasteners use cross sink grooves, but because the present invention adds an annular sleeve, the structural strength of the connection is increased; the fasteners can withstand greater twisting force, so internal hexagonal sink grooves are provided on the fasteners. , the L-shaped hexagonal wrench can be used to tighten the fasteners, making the operation more labor-saving and easier.

Furthermore, between the two table units after splicing, since the diameter of the positioning pin is larger than the diameter of the connecting rod, the positioning pin is thicker than the connecting rod, and then the positioning pin mainly plays the role of bearing force after connection; and The connecting rod mainly plays the role of tightening the two table units; both perform their own duties to prevent the connecting rod from loosening due to force; so that the two table units can always be locked.

Description of drawings

Figure 1 is a schematic three-dimensional structural diagram of two table units after splicing in the implementation of the present invention;

Figure 2 is a schematic structural diagram of the positioning pin and connecting rod located inside the two table units in the embodiment of the present invention;

Figure 3 is a schematic three-dimensional structural diagram of a single table unit in an embodiment of the present invention;

Figure 4 is a schematic three-dimensional structural diagram of the hole arrangement device in an embodiment of the present invention;

Figure 5 is an enlarged view of part A in Figure 4;

Figure 6 is a schematic three-dimensional structural diagram of the rear end of the hole arrangement device in an embodiment of the present invention;

Figure 7 is a schematic three-dimensional structural diagram of the side of the hole row device in the embodiment of the present invention;

Figure 8 is an enlarged view of part B in Figure 7;

Figure 9 is a schematic three-dimensional structural diagram of a single table unit placed on a supporting station in an embodiment of the present invention;

Figure 10 is a schematic three-dimensional structural diagram of a supporting platform in an embodiment of the present invention;

Figure 11 is a schematic three-dimensional structural diagram of the synchronization mechanism in an embodiment of the present invention;

Figure 12 is a schematic three-dimensional structural diagram of a drilling mechanism in an embodiment of the present invention;

Figure 13 is a schematic three-dimensional structural diagram of a three-in-one connector disposed between two table units in an embodiment of the present invention;

Figure 14 is an enlarged view of part C in Figure 13;

Figure 15 is a schematic three-dimensional structural diagram of the fasteners, annular sleeves and slots in an embodiment of the present invention;

Figure 16 is a schematic three-dimensional structural diagram of an annular sleeve in an embodiment of the present invention.

Each reference number is: table unit a; spliced side wall a1; hole row device B; workbench 1; support platform 2; support horizontal plate 2a; side positioning component 3; limit horizontal plate 4; front positioning Component 5; front positioning push plate 6; positioning pressure plate 7; positioning pressure beam 8; drilling mechanism 9; adjustment support 10; drill bit drive motor 101; drill bit 11; slide rail 12; slide seat 13; sliding telescopic assembly 14; Sliding drive cylinder 14a; groove 15; positioning side plate 3a; first push-pull drive cylinder 3b; positioning bump 16; second push-pull drive cylinder 5a; support bump 4a; avoidance slot 17; column 18; upper Suspension 19; side support beam 191; upper support beam 192; first lifting cylinder 193; second lifting cylinder 20; lifting seat 21; synchronization mechanism 22; rotating link 23; guide wheel 231; guide groove 232; synchronization Transverse axis 24; side support platform 25; fixed support 26; rear drive mechanism 27; lifting console 28; base plate 29; guide column 30; rear lifting assembly 31; digital position display 31a; screw rod 32b; rear push-pull electric cylinder 32 ;Telescopic main rod 321; guide rod 33; positioning hole 34; connecting rod 35; eccentric fastener 36; knurl pattern 36a; internal hexagonal sink groove 36b; embedded groove 37; annular sleeve 38; outer convex teeth 38a; inner Protruding teeth 38b; via holes 39; notches 40; positioning pins 41.

Embodiments of the invention

Step 1: As shown in Figure 1-3, prefabricate at least two table unit a for splicing. The table unit a can be spliced together to form an overall horizontal desktop;

Step 2: As shown in Figure 3-12, use the hole row device B to drill holes in the spliced side wall a1 of a single table unit a in sequence; thus it is convenient to set up a connection structure between the two table units a. The hole arrangement device B is a device designed by the present invention to facilitate the hole processing of the table unit a; the hole arrangement device B includes a workbench 1, and the workbench 1 has a supporting station 201, which supports the workbench. Position 201 is provided with a supporting platform 2 for carrying the table unit a, and side positioning assemblies 3 are provided on both sides of the supporting platform 2; the workbench 1 is also provided with a front and rear positioning mechanism and an up and down positioning mechanism; The front and rear positioning mechanism includes a limiting horizontal plate 4 provided at the rear end of the workbench 1 and a front positioning component 5 disposed at the front end of the workbench 1; the front positioning component 5 includes a table unit a located on the supporting platform 2 Push back to the front positioning push plate 6 that abuts the limiting horizontal plate 4. The up and down positioning mechanism includes a positioning pressure plate 7 and a positioning pressure beam 8 which are arranged above the supporting platform 2 and can be raised and lowered. They are pressed down at the same time to press the table unit a on the supporting platform 2 . A drilling mechanism 9 for drilling the table unit a is provided behind the limiting horizontal plate 4. The drilling mechanism 9 includes an adjustment support 10 that can be moved forward and backward and up and down, and an adjustment support 10 arranged along the left and right directions. A row of drill bits 11.

Specifically: as shown in Figure 4-10, the workbench 1 is located below the support platform 2 and is provided with two slide rails 12 spaced front and back. The slide rails 12 extend along the left and right directions; on the support platform 2 The front and rear sides of the bottom of the support platform 2 are respectively provided with sliding seats 13 slidably arranged on each slide rail 12, so that the entire support platform 2 can slide left and right along the slide rails 12; and on one side of the workbench 1 There is a sliding telescopic assembly 14 for driving the supporting table 2 to slide along the slide rail 12. The sliding telescopic assembly 14 includes a sliding driving electric cylinder 14a connected to the workbench 1. The push rod on the sliding driving electric cylinder 14a is connected to at the bottom of the supporting platform 2; and then the sliding drive electric cylinder 14a can control the supporting platform 2 to move left and right; after the table unit a is positioned on the supporting platform 2, the supporting platform 2 can be controlled to move left and right. Further adjust the left and right position of table unit a.

As shown in Figures 4 and 10, the supporting platform 2 has a plate-like structure, and the supporting platform 2 includes two supporting horizontal plates 2a spaced front and back and extending along the left and right directions. The supporting horizontal plates 2a are configured as Support the table unit a; and the upper end surface of each support horizontal plate 2a is provided with grooves 15 arranged in a wave shape, and the grooves 15 are arranged on the support horizontal plate 2a along the front and rear direction. The purpose of this design is: if the upper end surface of the supporting horizontal plate 2a is completely horizontal, the contact area between the table unit a and the supporting horizontal plate 2a is relatively large, and it is difficult to ensure that the table unit a is completely squeezed and fitted to the supporting horizontal plate 2a On the upper end surface, there will inevitably be a gap; and setting the groove 15 on the upper surface of the support cross plate can reduce the contact area between the support cross plate 2a and the table unit a, so that the up and down extrusion pressure at the contact point between the two Larger, which makes the compression and positioning effect better and the positioning more solid; the structure design is clever and more thoughtful. The side positioning assembly 3 is mirrored on the left and right sides of the supporting platform 3. The side positioning assembly 3 includes a positioning side plate 3a and a first push-pull driving electric cylinder 3b that can drive the positioning side plate 3a to move left and right; and There are also strip-shaped positioning bumps 16 on the front and rear sides of the side positioning assembly 3, and the positioning bumps 16 are arranged in the left and right directions; when placing the table unit a on the supporting platform 2, first One end of the table unit a is against the ends of the two positioning bumps 16, so that the table unit a remains horizontally and squarely placed on the supporting platform 2; then the positioning side plates 3a on the left and right sides can be positioned respectively. Under the action of the first push-pull driving cylinder 3b, it approaches the table unit a to clamp the table unit a firmly, so that the table unit a and the supporting platform 2 are relatively fixed in the left-right direction.

As shown in Figures 4-9, the front positioning assembly 5 is arranged on the workbench 1 and is located in front of the supporting platform 2. The front positioning assembly 5 includes the front positioning push plate 6 and is used to drive the front positioning push plate 6. The second push-pull driving electric cylinder 38a that moves the push plate 6 back and forth is positioned. The limiting horizontal plate 4 is in an upright state and is located at the rear end of the supporting platform 2. When the table unit a is placed on the supporting platform 2, the front positioning push plate 6 will be pushed backward. The table unit a moves so that the rear end of the table unit a is against the limiting horizontal plate 4, so that the table unit a is clamped between the front positioning push plate 6 and the limiting horizontal plate 4, so that the table unit a It is relatively fixed with the supporting platform 2 along the front and rear direction. Further, as shown in Figures 4-5, along the left and right directions, the limiting horizontal plate 4 is provided with escape slots 17 arranged at intervals on the left and right for avoiding the forward extension of the drill bit 11; The lower part of the front end of the limiting horizontal plate 4 is provided with a number of support bumps 4a that extend forward and are spaced left and right. The avoidance slot 17 is located between the two support bumps 4a; the support bumps 4a are arranged To support the table unit a; and the upper end surface of the support convex block 4a is flush with the upper end surface of the supporting platform 2; specifically: when the rear end of the table unit a is against the limiting horizontal plate 4, The bottom of the table unit a will be in contact with the support bump 4a. At this time, the support bump 4a and the supporting platform 2 jointly support the table unit a; and the two adjacent support bumps 4a are spaced apart; When the drill bit 11 drills the table unit a, the wood chips of the table unit a can just fall from the gap between the two support bumps 4a; otherwise, dust will easily accumulate under the table unit a, causing the table to be damaged. The board unit a is elevated or affects the operation of the machine; therefore, spaced support bumps 4a are provided to support the table board unit a while allowing sawdust to fall and avoid dust accumulation; the structural design is ingenious.

As shown in Figure 4-9, there are upwardly extending columns 18 on both sides of the rear end of the workbench 1, and the upper end of the column 18 is provided with a forwardly extending U-shaped upper suspension 19. The suspension 19 includes a side support beam 191 connected to the upper end of the column 18 and extending forward, and an upper support beam 192 connected between the two side support beams 191; The cylinder 193 controls lifting; the upper end of the first lifting electric cylinder 193 is connected to the upper support beam 192. The positioning pressure plate 7 is configured as two spaced apart on the left and right, and as shown in Figure 8, the positioning pressure plate 7 is located directly above the supporting platform 2; then the positioning pressure plate 7 can be initially pressed down so that the table unit a is pressed against the On the supporting table 2.

Further: the positioning pressure beam 8 is also located above the supporting platform 2, and the positioning pressure beam 8 is arranged above the intersection position of the supporting bump 4a and the supporting platform 2; this is because when drilling, the table is The rear end of the table unit a is drilled; only the positioning pressure plate 7 is used to press the table unit a, and the back end of the table unit a still shakes when drilling; therefore, a positioning pressure beam 8 is also provided to further press the table unit a. The rear position of the table unit a ensures that the rear end of the table unit a remains stable during the drilling process; and the distance between the rear end of the positioning pressure beam 8 and the limit beam 4 is 1cm, so that the positioning pressure beam 8 can Press firmly on the rear punched area of table unit a. And on both sides of the rear end of the workbench 1, there are respectively second lifting electric cylinders 20 for driving the positioning pressure beam 8 to lift. The bottom of the second lifting electric cylinder 20 is provided with a lifting base 21. The second lifting electric cylinder 20 The lifting base 21 can be controlled to rise and fall; and the positioning pressure beam 8 is connected to the front end of the lifting base 21; and as shown in Figure 11, a synchronization mechanism 22 is also provided between the lifting bases 21 on the left and right sides. The synchronization mechanism 22 includes a rotating link 23 that is rotated inside each lifting seat 21, and a synchronous horizontal axis 24 connected between the rotating links 23 on both sides; there are also upward extending shafts 24 on both sides of the rear end of the workbench 1. The side support platform 25 is connected and fixed with a fixed support 26 extending forward, and the synchronous horizontal axis 24 is rotated through the two fixed supports 26; the rotating link 23 The front end is connected to the synchronous horizontal shaft 24, and the rear end of the rotating link 23 is rotationally connected to a guide wheel 231. The inner wall of the lifting seat 21 is provided with a guide groove 232 slidingly matching the guide wheel 231 along the front and rear directions; and then , when the second lifting cylinders 20 on both sides synchronously drive the lifting base 21 to move up and down, each lifting base 21 will rotate the rotating link 23 respectively to drive the synchronous horizontal axis 24 to rotate; and the rotating link 23 will The guide wheel 231 is driven to slide forward and backward along the guide groove 232 accordingly; the lifting seats 21 on both sides can synchronize the rotation of the horizontal axis 24, and then the lifting seats 21 on both sides must keep rising and falling synchronously to make the device operate stably; thus the positioning pressure beam can be positioned 8 will maintain a horizontal upward and downward movement as a whole, so that when the positioning pressure beam 8 is pressed down, the pressure exerted on each part of the table unit a is equal, and the table unit a can be pressed more effectively.

As shown in Figure 12, the drilling mechanism 9 also includes a rear drive mechanism 27 for driving the adjustment support 10. The rear drive mechanism 27 includes a rear drive mechanism 27 arranged behind the adjustment support 10 and connected and fixed on the workbench 1. The base plate 29 and two guide pillars 30 spaced left and right on the base plate 29; a lifting console 28 is provided on the two guide pillars 30, and the lifting console 28 can move up and down along the guide pillars 30; and on the two guide pillars 30 The upper end of 30 is provided with a rear lifting assembly 31 for controlling the lifting of the lifting console 28. The rear lifting assembly 31 adopts a screw nut structure. The rear lifting assembly 31 includes a screw 32b and a screw embedded in the upper end of the lifting console 28. nut (not shown); the lower end of the screw rod 32b is inserted into the upper end of the lifting console 28 and matched with the thread nut; a digital position display 31a is also provided above the lifting console 28. Specifically, the digital The position indicator 31a is located on the base plate 29; the screw rod 32b passes upward through the digital position display 31a, and the exit end of the top of the screw rod 32b is also provided with a handwheel (not shown); the screw rod 32b is generally passed through a bearing or a limiter. The position clamp is limited to rotate in the circumferential direction but not to move axially; during operation, the handwheel is turned to drive the screw rod 32b to rotate to control the lifting and lowering of the screw nut to adjust the lifting and lowering movement of the lifting console 28. The digital position display 31a It is a common mechanical counter used to cooperate with the screw rod 32b. It can detect the number of rotations of the screw rod 32b and cooperate with the pitch of the screw rod 32b to automatically calculate the height displacement of the lifting console 28, making the adjustment more accurate. For example, when drilling an 18mm thick plate, the handwheel can be controlled to rotate. When the reading of the above-mentioned mechanical counter is 9, the drill bit will be in the middle of the plate thickness.

And the lifting console 28 is also provided with a rear push-pull electric cylinder 32; the rear push-pull electric cylinder 32 has a telescopic main rod 321 that can be electrically telescopic, and the telescopic main rod 321 passes forward through the lifting console 28 and is connected. At the rear end of the adjusting support 10; and on both sides of the adjusting support 10 located at the telescopic main rod 321, there are guide rods 33 that slide backward and penetrate the lifting console 28. The guide rods 33 can be controlled in relative lifting. The platform 28 slides forward and backward; further improving the structural stability. Then, the rear lifting assembly 31 can drive the lifting console 28 and drive the rear push-pull electric cylinder 32 to move up and down, thereby controlling the adjustment support 10 to move up and down; and the rear push-pull electric cylinder 32 can drive the adjustment support 10 to move forward and backward. Therefore, under the action of the rear driving mechanism 27, each drill bit 11 can be controlled to move up and down and forward and backward in the avoidance slot hole 17, so that the initial height position of the drill bit 11 can be adjusted in advance.

And as shown in Figure 12, the drill bits 11 are all pre-adjusted, and the centers of each drill bit 11 are on the same horizontal straight line, ensuring that the center of each hole after drilling is on a straight line. A drill driving motor 101 is provided on the side of the rear end of the adjusting support rod 10, and a horizontal gear synchronous transmission mechanism (not shown in the figure) for driving each drill bit 11 to perform synchronous drilling work is also provided inside the adjusting support rod 10. ), the gear synchronous transmission mechanism includes a synchronous belt and a plurality of gears, which are driven by gear meshing to provide the working power of the drill bit 11; then the drill bit driving motor 101 drives the gear synchronous mechanism to control each drill bit 11 to perform drilling operations synchronously.

When drilling the table unit a, the user only needs to place the table unit a on the supporting platform 2; then install the side positioning component 3, the front positioning component 5, the positioning pressure plate 7 and the positioning pressure beam. 8, the table unit a can be automatically and stably positioned on the supporting platform 2; then the drilling mechanism 9 can drive the side-by-side drill bits 11 to synchronously feed the side panels a1 at the rear end of the table unit a. Drilling; and a row of left and right staggered positioning holes 34 and through holes 39 can be formed on the spliced side wall a1 of the table unit a in one operation, thereby realizing fully automated drilling of the table unit a, making the drilling The hole processing efficiency is high and the production capacity is increased. Moreover, the hole position accuracy is high, which can ensure that the center of each positioning hole 34 and the via hole 39 is kept on the same horizontal line.

Step 3: As shown in Figures 1-3 and 13-16, then embed a hard annular sleeve 38 in the table unit a, and set a three-in-one connector between the two table units a. , wherein the three-in-one connector includes a connecting rod 35 and an eccentric fastener 36 of an eccentric structure provided on at least one of the table units a, and the eccentric fastener 36 is configured to be used with the connecting rod 35 Snap fit to tighten and splice the two table units a together. And in step 2, the through hole 39 for the connecting rod 35 to pass through has been processed on the spliced side wall a1 of the table unit a; then in this step, one end of the connecting rod 35 can be further inserted and tightened. In one of the table unit a.

Specifically: in the present invention, the two table top units a are equipped with eccentric fasteners 36 to connect and cooperate with the connecting rods 35; In the embedding groove 37 that accommodates the eccentric fastener 36; the hard annular sleeve 38 is pre-embedded in the embedding groove 37, and the eccentric fastener 36 is embedded in the annular sleeve 38 and Can rotate circumferentially within the annular sleeve 38 . Specifically: the annular sleeve 38 is made of plastic or metal, making it a hard material that is not easily deformed and has good stress strength; the purpose of setting the annular sleeve 38 in the present invention is to: The annular sleeve 38 is pre-embedded inside, so that when the eccentric fastener 36 is screwed in the embedding groove 37, it will not come into extrusion contact with the table unit a, but directly contact the hard annular sleeve 38; this is because The common table top structure is roughly composed of: a middle core material and hard plywood on both sides of the core material. The hard plywood is covered with paper or veneer layer on the outside. For some table tops with a soft middle core material, such as The core material in the middle is Nanyang Yingda. If equipped with a three-in-one connector, if the eccentric fastener 36 is in direct contact with the middle core material; then when the connecting rod 35 is tightened by twisting, the eccentric fastener 36 will It will come into extrusion contact with the core material, and because the core material is soft, the eccentric fastener 36 may be embedded in the core material skewed up and down, resulting in poor locking effect and affecting the appearance. Therefore, by pre-embedding the hard annular sleeve 38 in the embedding groove 37, the eccentric fastener 36 directly contacts the annular sleeve 38, so that the eccentric fastener 36 can maintain forward screwing and will not deflect. ; Guarantee the locking effect and beautify the appearance.

Among them, the cross section of the eccentric fastener 36 is circular, and the embedding groove 37 is correspondingly set as a circular groove; the annular sleeve 38 is configured to be clamped and embedded in the embedding groove 37, and the two are interference fit; After the annular sleeve 38 is embedded in the embedding groove 37, it will not break away from the embedding groove 37. As shown in Figure 16, the outer wall of the annular sleeve 38 is evenly provided with external protruding teeth 38a distributed in a wavy shape; the external protruding teeth 38a enable the annular sleeve 38 to be embedded in the embedding groove 37, The contact area between the annular sleeve 38 and the embedding groove 37 is reduced, making it easier for the annular sleeve 38 to fit into the embedding groove 37; and after the annular sleeve 38 is embedded in the embedding groove 37, the outer convex teeth 38a It can also increase the friction between the two, so that the two are tightly connected, and the annular sleeve 38 will not deflect in the embedded groove 37 . Furthermore, the height of the annular sleeve 38 is consistent with the longitudinal depth of the caulking groove 37 . After the annular sleeve 38 is embedded in the embedding groove 37, the upper end surface of the annular sleeve 38 is flush with the upper end surface of the table unit a, making the structure beautiful. Then, the eccentric fastener 36 will always be in contact with the annular sleeve 38 and will not be in extrusion contact with the inner core of the table unit a; thus ensuring a stable connection structure.

As shown in Figures 13-15, the through hole 39 extends until it penetrates the embedding groove 37; the annular sleeve 38 is correspondingly provided with a notch 40 for the connecting rod 35 to pass through. In addition, an internal hexagonal sink groove 36b is provided at the center of the upper end surface of the eccentric fastener 36; the traditional eccentric fastener 36 adopts a cross sink groove, but due to the addition of an annular sleeve 38 in the present invention, additional The structural strength of the connection is increased; the eccentric fastener 36 can withstand greater twisting force, so an internal hexagonal sink groove 36b is provided on the eccentric fastener, and an L-shaped internal hexagonal wrench can be used to tighten the eccentric The firmware 36 makes the operation more labor-saving and easier; as for the specific connection method of the three-in-one connector, it is common in the prior art and is not a design point of the present invention, so it will not be described in detail in this embodiment. Furthermore, the inner wall of the annular sleeve 38 is evenly provided with internal convex teeth 38b arranged in a wavy manner; correspondingly, the outer wall of the eccentric fastener 36 is provided with knurled patterns 36a; The friction force between the annular sleeve 38 and the eccentric fastener 36 is increased so that the eccentric fastener 36 will not retreat after being screwed in the annular sleeve 38; thus, it plays a role of stopping the retreat. Then in this step, the connecting rod 35 is first engaged with the eccentric fastener 36 on one of the table unit a.

Step 4: Then insert positioning pins 41 in sequence in the positioning hole 34 of one of the table unit a; the positioning pin 41 is configured to plug-fit with the positioning hole 24; and the positioning pin 41 is made of metal steel pipe; ensure the structure strength.

Step 5: Then splice the two table units a together so that both ends of the positioning pin 41 are inserted into the positioning holes 34 of the two table units a; the two ends of the connecting rod 35 are also inserted into the two table units. In the through hole 39 of the board unit a; at this time, the spliced side walls a1 of the two table board units a are initially spliced together.

Step 6: Finally, tighten the eccentric fastener 36, and the eccentric fastener 36 will tighten the connecting rod 35 to lock the two table units a. Finally, the knob eccentric fastener 36 is used to further make the splicing between the two table units a closer, thereby achieving a stable splicing between the two table units a. Furthermore: the diameter of the positioning pin 41 is larger than the diameter of the connecting rod 35 (the diameter of the drill bit 11 can be set in advance); so that the positioning pin 41 is thicker than the connecting rod 35, and then the positioning pin 41 mainly serves as a load bearing after connection. Due to the force, when one table unit a is subjected to extrusion force, the positioning pin 41 distributes the force; and the connecting rod 35 mainly plays the role of tightening the two table units a; each performs its own function. position to prevent the connecting rod 35 from loosening due to force, so that the two table unit a can always be locked. As shown in Figure 2, the connecting rod 35 includes a rod body and rod heads located at both ends of the rod body for connection; the length of the positioning pin 41 and the length of the rod body tend to be equal; the purpose of this design is: After the two table units a are spliced, when one of the table units a is subjected to an extrusion force, the pressure points at both ends of the rod body and the positioning pin 41 are on the same axis, making the structural stress more evenly distributed. Furthermore, in step two, the hole row device B is used to achieve high machining accuracy of the holes on the table unit a, so that the positioning pin 41 and the connecting rod 35 are at the same height; so that when splicing, the two table units a The splicing between them is smoother, and the structure is better stressed; it will not make the splicing joint uneven.

In summary, in the table processing and splicing process of the present invention, the table unit a uses the hole row device B to process the positioning holes 34 and the through holes 39, which has high processing efficiency and good hole position accuracy. Secondly, a hard annular sleeve 38 is pre-embedded in the embedding groove 37 to prevent the eccentric fastener 36 from squeezing the inner core of the table unit a and causing an unstable connection; making the connection effect of the three-in-one connector better, The structure is more stable; the positioning pin 41 is used to bear the force, and the connecting rod 35 is used to tighten the table unit a; ultimately, the table unit a is convenient to process, and the splicing structure between the two table units a is higher, and the spliced Better flatness.

Industrial applicability

Type the industrial usefulness description paragraph here.

Sequence Listing Free Content

Type the sequence listing free content description paragraph here.

Claims

A table processing and splicing technology, which is characterized by: including the following steps:

Step 1: Prefabricate at least two table units for splicing, and the table units can be spliced to form an overall horizontal desktop;

Step 2: Use the hole arrangement device to drill holes in the spliced side walls of a single table unit in sequence; place and position the table unit on the supporting station of the hole arrangement device; position the positioning pressure plate directly above the table unit And the positioning pressure beam located at the rear and upper part of the table unit is pressed down respectively to compress the table unit; multiple drill bits located at the rear end of the table unit and arranged in the horizontal direction feed simultaneously to splice the side walls of the table unit A row of positioning holes are formed through one-time processing, and the centers of the positioning holes are on the same straight line;

Step 3: Pre-embed a hard annular casing in the table unit, and set a three-in-one connector between the two table units; the connecting rod of the three-in-one connector is pre-inserted into one of the table units. inside; set the eccentric fastener of the eccentric structure of the three-in-one connector inside the annular casing;

Step 4: Insert the positioning pins into the positioning holes of one of the table units in order, and the positioning pins are plugged into the positioning holes;

Step 5: Splice the two table units together so that both ends of the positioning pins are inserted into the two table units; at the same time, the two ends of the connecting rod are inserted into the two table units;

Step 6: Tighten the eccentric fastener, and the eccentric fastener will tighten the connecting rod to lock the two table units.
The tabletop processing and splicing process according to claim 1, characterized in that in step three, an internal hexagonal sink groove is formed on the upper end surface of the eccentric fastener.
The table processing and splicing process according to claim 1, characterized in that: in step two, a plurality of through holes for passing connecting rods are formed on the splicing side walls of the table unit; the through holes are It is processed simultaneously by the drill bit when processing the positioning hole. The center of the through hole and the positioning hole are also on the same straight line; the end face of the table unit is provided with an insert for accommodating the eccentric fastener at the corresponding through hole position. The groove, the via hole and the embedding groove are connected; in step three, the annular sleeve is embedded and installed in the embedding groove, and the height of the annular sleeve is equal to the longitudinal depth of the embedding groove.
The table processing and splicing process according to claim 3, characterized in that: the through holes and the positioning holes are arranged in a staggered manner.
The table processing and splicing process according to claim 3, characterized in that: the annular sleeve is clamped in the embedding groove, and the annular sleeve and the embedding groove are interference fit.
The table processing and splicing process according to claim 5, characterized in that: the annular sleeve is provided with a notch for the connecting rod to pass through; and the outer wall of the annular sleeve is evenly provided with a wavy distribution The outer convex teeth are evenly arranged on the inner wall of the annular casing and are arranged in a wavy shape.
The table processing and splicing process according to claim 1, characterized in that: in step two, there is a supporting platform for carrying the table unit at the supporting station; side positioning assemblies located on both sides of the supporting platform And the front and rear positioning mechanisms located at the front and rear ends of the supporting platform position the table unit horizontally on the supporting platform.
The table processing and splicing process according to claim 7, characterized in that: the front and rear positioning mechanisms include a limiting horizontal plate disposed at the rear end of the workbench and a front positioning assembly disposed at the front end of the workbench; the front positioning assembly includes a The front positioning push plate moves forward and backward; the front positioning push plate pushes the table unit backward until it butts against the limit horizontal plate front and back.
The table processing and splicing process according to claim 8, characterized in that: the hole arrangement device includes a drilling mechanism arranged behind the limiting horizontal plate, and the drilling mechanism includes an adjustment support that can move forward and backward and up and down, The drill bits are arranged side by side on the adjustment support along the left and right directions; and the limit horizontal plate is provided with escape slots arranged at intervals on the left and right for avoiding the movement of the drill bit, and the avoidance slots penetrate the limit horizontal plate front and rear.
The table processing and splicing process according to claim 9, characterized in that: the lower part of the front end of the limiting horizontal plate is provided with a number of support bumps extending forward and arranged at intervals on the left and right. The support bumps It is configured to support the table unit; any avoidance slot is located between two support bumps; and the upper end surface of the support bumps is flush with the upper end surface of the supporting platform.
The table processing and splicing process according to claim 10, characterized in that: the positioning pressure beam is arranged above the intersection position of the support bump and the supporting platform.
The table processing and splicing process according to claim 11, characterized in that along the front and rear direction, the distance between the rear end of the positioning pressure beam and the limiting horizontal plate is between 0.5-5cm.
The table processing and splicing process according to claim 9, characterized in that: the drilling mechanism further includes a rear driving mechanism for driving the adjusting support, and the rear driving mechanism includes a base plate and two rods arranged on the base plate. Guide posts spaced left and right; a lifting console is provided on the two guide posts, and the lifting console can move up and down along the guide posts; and a rear lifting assembly is provided at the upper end of the two guide posts for controlling the lifting of the lifting console; And the lifting console is also provided with a rear push-pull electric cylinder; the telescopic main rod on the rear push-pull electric cylinder passes forward through the lifting console and is connected to the rear end of the adjustment support.
The table processing and splicing process according to claim 13, characterized in that: the rear lifting assembly is a screw nut structure, and one end of the screw is connected with a handwheel that controls the rotation of the screw.
The table processing and splicing process according to claim 7, characterized in that: the supporting platform includes two supporting horizontal plates spaced front and rear and extending along the left and right directions, and the supporting horizontal plates are configured to support Table unit; and the upper end surface of each supporting horizontal plate is provided with grooves arranged in a wave shape, and the grooves are arranged on the supporting horizontal plate along the front and rear directions.
The table processing and splicing process according to claim 1, characterized in that: the connecting rod includes a rod body and rod heads located at both ends of the rod body for connection; the length of the positioning pin and the length of the rod body tend to be equal.
A table assembly structure, which is characterized in that: it includes two table units spliced together; the two table units are connected by a three-in-one connector, and the three-in-one connector includes two table units that are inserted into the two table units at the same time. The connecting rod in the unit and the eccentric fastener provided on at least one of the table units. The eccentric fastener is configured to fit tightly with the connecting rod; an eccentric accommodation is provided on the end surface of the table unit. The embedding groove of the wheel fastener; the cross section of the eccentric wheel fastener is circular, the embedding groove is correspondingly set as a circular groove, and the diameter of the embedding groove is larger than the diameter of the eccentric wheel fastener; pre-installed in the embedding groove A hard annular casing is embedded, and the eccentric fastener is embedded in the annular casing and can rotate circumferentially within the casing.
The table assembly structure according to claim 17, characterized in that: a connection hole for passing a connecting rod is provided on the side of the table unit, and the connection hole extends until it penetrates the embedded groove; The annular sleeve is correspondingly provided with a through hole for the connecting rod to pass through; the annular sleeve and the embedding groove are an interference fit.
The table assembly structure according to claim 17, characterized in that: the outer wall of the annular sleeve is evenly provided with wavy-shaped protruding teeth, and the inner wall of the annular sleeve is evenly provided with a wavy shape. The inner convex teeth are arranged in a wavy shape; there are knurled patterns on the outer wall of the eccentric fastener.